/* 清除默认样式 */
*{
    padding: 0;
    margin: 0;
    list-style: none;
    text-decoration: none;
    font-style: normal;
}


.y-ybanxing{
    margin: auto;
    width: 1920px;
    height: 100%;
    background-color: aquamarine;
}


.y-ytu1{
    margin: auto;
    width: 1920px;
    height: 1220px;
}
.y-yxiatu{
    width: 1920px;
    height: 2158px;
    margin: auto;
}


    /* 返回顶部 */
    .faanhuidengbu{
        z-index: 80px;
        position:fixed;
        right: 0;
        bottom: 150px;
        width: 50px;
        height: 270px;
        /* border: 1px solid rgb(255, 0, 76); */
        border-radius: 50px;
        background-color: #333;
        opacity: 0.5;
    }
    
    
    .fanhuian1{
        width: 50px;
        /* border: 1px solid rgb(255, 0, 76); */
        border-radius: 25%;
        height: 90px;
        text-align: center;
        line-height: 80px;
        font-size: 20px;
        
    }
    .fanhuian2{
        /* border: 1px solid rgb(255, 0, 76); */
        width: 50px;
        height: 90px;
     
        text-align: center;
        line-height: 80px;
        border-top: 2px solid rgb(255, 255, 255);
        border-bottom: 2px solid rgb(255, 255, 255);
    }
    .fanhuian3{
        width: 50px;
        /* border: 1px solid rgb(255, 0, 76); */
        border-radius: 25%;
        height: 90px;
        text-align: center;
        line-height: 80px;
        font-size: 20px;
        
    }
    .faanhuidengbu .iconfont{
        font-size: 40px;
        color: rgb(255, 255, 255);
        
    }